Apparatus for returning exhaust-steam to boilers and heating feed-water



(No Model.) 2 Sheets-Sheet 1.

' R. M. SOHOTZKO. APPARATUS FOR RETURNING-EXHAUST STEAMTO BOILERS AND HEATING FBE'D WATER.

Patented Jan. 16

2 Sheets-Sheet 2.

(No Model.)

.R. M. 'SOHOTZKO. APPARATUS FOR RETURNING EXHAUST STEAM TO BOILERS AND HEATING FEED WATER.

aware/144107 Z JA/ A W abbot/wa s,

Patented Jan. 16,1894.

LWW

THE NATIONAL umoammma caulk.

WABNINGTON. a e.

V UNITED STATES PATENT OFFICE.

RUDoLF' M. soHoTzKo, on TACOMA, WASHINGTON.

APPARATUS FOR RETURNING EXHAUST-STEAM TO BOILERS AND HEATING FEED-WATER.

SPECIFICATION forming part of Letters Patent No. 512,993, dated January 16, 1894.

Application filed April13, 1893. Serial a. 470,241. on model.)

a citizen of the United States, residing at Tacoma,in the county of Pierce and State of Washington, have invented certain new and useful Improvements in Apparatus for Beturning Exhaust-Steam to Boilers and Heating Feed-Water; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to means for returning exhaust steam to boilers, and also acombination of such means with the feed Water supply of steam boilers; and its objects are, first, to save the exhaust steam and return it to the boiler for use as live steamafter it has been re-heated in the boiler to the original temperature,-and, second,to utilize the heat of the exhaust steam on its way back to the boiler for heating the feed water from a pump or force supplying apparatus My invention consists, first,in an auxiliary duplex steam pump, in combination with an exhauststeam pipe of a main engine and'the discharging end of the water supply pipe of a steam boiler; and second, it consists in a duplex steam pump, in combination with an exhaust steam pipe of a main engine, a steam reservoir around a portion of the supply pipe of the feed water forcing apparatus, and the boiler, as will be hereinafter described and claimed.

In the accompanying drawings, Figure 1 is a top View of a main steam engine, boiler, and a water supplying apparatus of ordinary construction, showing my improvements interposed between the same and connected therewith. Fig. 2 is a vertical longitudinal section of the means for heating feed water on its return with the exhaust steam to the boiler. Fig. 3 is a vertical section through one of the cylinders and the steam chest of the auxiliary duplex steam pump, and Fig.4 is a horizontal section of the duplex steam pump on a line just above the gate valves.

A in the drawings is the main steam generating boiler; 13 the main engine connected to the boiler by live steam pipe a; O a steam pump or other forcing feed water supplying apparatus for the boiler.

D is a duplex, auxiliary steam pumping apparatus connected to the steam engine by an exhaust steam pipe E and by means of a steam storing reservoirF and pipe G leading into the steam chest H of the duplex steam pump D, and'with theboiler by means of pipes I, I, I 1 1 1 ,1 I 1 I. The pipe E is provided with a gate or check valve E, the pipe G with a cut oft valve g, the pipes I, I, 1 I

- 1 and I with check valves l, 2, 3, 4, 5. The

valves J, J, J -J of the duplex steam pump open downward into the steam cylinders K K, and each of the cylinders discharges alternately at its forward and rear ends; the forward discharge of cylinder K being into pipe I and the rear discharge into pipe 1 while the forward discharge of cylinder K is into pipe I and the rear discharge into pipe I. The discharge from both cylinders flows into pipe I, and thence along pipes I, 1 I 1 into the boiler A to be reheated. The piston rods 19 b of the duplex steam cylinders K K may be connected to a duplex crank c, on the shaft of which may be a pulley d from which a belt e may pass and connect the duplex steam pump with the power shaft 9 of the main engine; or the duplex steam pump may be worked by a small duplex engine independently of the main engine, but it is pref Jerable to take a small amount of live steam power from the main engine boiler; oraportion of the exhaust steam from the reservoir might be made to operate an independent auxiliary duplex engine.

It is evident that as the operation of the duplex steam pump continuously forces the steam, the respective check valves operate in the usual manner of such valves, to prevent the back flow of the steam into the said pump. It is always necessary in order to insure the entrance of the steam from the duplex pump into the boiler to connect the steam return pipe with the water supply pipe of the boiler, and thereby unite the power of the water supplying apparatus with that of the duplex pump and thus have the water and steam injected together into the boiler.

If it is desirable, and I believe it will be ,found so, to heat :the feed water Quits passage to ,the :hoiler, the feed :pipe Lmay be passed through the exhaust steam storing reservoir, and the portion within the reser; 5 voir may be enlarged, or have its heating surface increased by corrugating it spirally. Under this construction the water pipe will be connected with the branches I I I of the exhauststeam pipe leading to the hoiler'ibe- IO yond theduplex steam pump.

The reservoir will be provided with an ordiy s eam s ge f @andlsatety v lve f; and; in the pipeE leading into the reservoir'Fand' the pipe G leading into the duplex steam I5 pump, the cocks E g, are provided so that thefitQa-ln may be *cut-ioff entirely from the tgh the reservoir and the duplexeteam puzmpgandg all bank ipl'flfiflt'ltlieiam liddiasaQGQfifiiQU may re- Equine.

By my invention a very great tsavaiug in waste lqf steam :usually exhausted into the; atmflfip smmil eefiee ed; andwiuadditiflm teed-water may befhfialied on its way to th boiler and :fina'ljly, with 318 16 e haust .=-st,eau1, 25 forced into the zboiler, y the duplex pump, and thus teQQnQmy in :fiufll and water the ef-i ifected. i

w hat ;I claim as any invention is 1. illhe relative -arrangement yand combina- F tionofuthe exhaust pipeof the main engine, 0 the exhaust stea mum, the f e water supply pipe leading to the boiler, the feed water supply pipe passed through the receiver, the duplex pump in operative connection withthe .exhauststeam receiver and the "feed water-pipe, and-suitable means for connecting the duplex pump with an engine for qpetatai-ng litrmhstwt allyas describe 2. The duplex steam pump having a single steam chest, two cylinders, two pistons and four gate Malves opening downwar in to the cylindersand iour-valve-controlled discharge apipes leading out of the cylinders, in combination with a steam engine for operating the duplex pump,;'a,-steam :hoilenmmmin steam engine, :a-n exhaust steam :recei'wermith con- :nQQtiQllS zlea ding 3011i) 5120 :the :suction :pipe of duplex pum-pafreed WMQUSHPPIYIPPWB lea ing soitheibqilermndeonneotionsatheremith 10M1- ing from the zdisehauge pipe-of gsaid duplex 5o pump, substantially as tdescni-hed.

iIn itestimouy whereof :I iheneunto .aflix any signature in presence of :two "witnesses.

RUDOI F JSCHO'DZKO.

Witnesses:

E. T. Murmu -10K, (1. CALv RT iHINEs. 

